After lurking around in these forums for the past many months I finally jumped on the E-ink wagon and got myself a Sony PRS-500 instead of my Ipaq HX2750.
And what a difference it is.
Some of my main concerns before the shift was:
1. DRM-files: I buy a lot of DRM'ed Mobipocket files, so I was wary of the transition, untill I found out how to remove the DRM of the files (Cybook wasn't really an option, since it's so darn expensive here in Europe. A used PRS-500 is the third of the price of a new Cybook).
2. Backlight: Although I do read a lot in bed, and the backlight is nice in such circumstances, the quality of the text, larger display and feel of the device more than makes up for my wife's loss of sleep.
3. Early adapter: I was worried about all the quirks that usually tags along new technology. But again I'm in awe of the flexibility it really offers if you just use some of the many tools developed by enthusiasts.
4. Pdf-support: I'm still working on getting the optimal results when converting pdf-files. Not quite there yet.
All in all: Happy days
Laz